By Steve Mohan
The short video shows chairs from the movie set with the character names on them. One of those chairs shows "James Warpath Proudstar" as one of those characters. Although not confirmed it is assumed that Booboo Stewart from the "Twilight" franchise will be taking on the role of Warpath.
In the comics, Warpath plays the younger brother of Thunderbird, a former X-Men who died in the line of duty. Warpath started off as a villain who blamed the X-Men and Charles Xavier for his brother's death. He eventually becomes a hero and has been a major character in many Marvel titles since then.
Booboo Stewart isn't Native and shouldn't get the role. That's another casting crime perpetuated against Native actors.
For more on Indians and the X-Men, see Why Thunderbird Was Killed and No Indians in X-Men Movies.